US7026741B2 - Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor - Google Patents
Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor Download PDFInfo
- Publication number
- US7026741B2 US7026741B2 US10/090,476 US9047602A US7026741B2 US 7026741 B2 US7026741 B2 US 7026741B2 US 9047602 A US9047602 A US 9047602A US 7026741 B2 US7026741 B2 US 7026741B2
- Authority
- US
- United States
- Prior art keywords
- stator
- motor
- members
- divided
- stator members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/0085—Prime movers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
Definitions
- the present invention relates to a motor or an electric generator including a stator formed by assembling divided stator-members into an annular shape, and it relates to an efficient and a high performance compressor incorporating the same motor.
- a stator having concentrated windings has been widely used in motors or electric generators.
- the concentrated-winding stator In the concentrated-winding stator, one-phase winding is wound on each tooth of the stator.
- This stator has an advantage that a height of the winding (winding-end section) can be lowered, so that the motor can be downsized.
- the concentrated winding stator has a small value of a wire-wound resistor, so that a small copper loss generated by a wire-wound current and a wire-wound resistor is expected.
- the motor thus can work efficiently.
- normal winding on a slot section which can accommodate the winding, increases a space factor of the winding in the stator.
- the wire-wound resistor value can be thus lowered, which achieves an efficient motor.
- Normal winding is provided to a stator-member divided corresponding to every one tooth of a stator. Then a plurality of teeth of the stator are linked into an annular shape. This is one of constructing methods of the concentrated winding stator. A linking section of every tooth wound with a wire is welded each other and formed into an annular stator.
- a stator is formed by laminating a plurality of core sheets of which thickness ranges from 0.5 to 0.2 mm.
- the surface of this core sheet is electrically insulated in order to reduce eddy current.
- FIG. 7A is a front view of a tooth of a stator.
- FIG. 7B is an axial sectional view of the tooth of the stator, and illustrates a status of welded laminations of core sheets.
- tooth 60 of the stator is formed by laminating a plurality of core sheets 61 , and winding 63 is wound concentrically on the lamination via insulator 62 .
- An end face of outer rim and an end face of inner rim of respective core sheets 61 are independently welded at welding spots 64 .
- Another laminating method uses adhesive core-sheets as material for insulating and coating the core-sheets.
- Adhesive has been applied to the adhesive core-sheets.
- These core-sheets are punched to shape into cores, and laminated in line. Then the laminated core-sheets are pressurized, heated, and bonded to be integrated into one unit.
- the punched core-sheets are often annealed in order to remove distortion produced by the punching, because the distortion adversely affects magnetic characteristics.
- An example of an annealing condition is this;
- peaks and valleys provided to parts of the core-sheets are caulked.
- the caulked parts according to this method adversely affects the magnetic characteristics, and lowers the motor efficiency.
- deflection thicknesswise is produced due to resiliency at the caulked parts. This deflection is unfavorable to the motor, in particular, of which stator is formed by assembling a plurality of divided members.
- the present invention addresses the problems discussed above, and aims to provide a small, efficient and high performance motor in a simple structure.
- the present invention also aims to provide a compressor incorporating the same motor.
- the motor of the present invention comprises the following elements:
- the compressor of the present invention includes this motor.
- This motor allows forming a lamination of the core sheets without welding at an inner rim of the stator.
- the inner rim of the stator faces the rotor, and encounters intense change of magnetic flux. Therefore, electrical insulation between the core-sheets laminated is not damaged, which does not increase eddy current. The motor efficiency is thus not adversely affected. As a result, a small, efficient and high performance motor in a simple structure is obtainable.
- FIG. 1 is a front view of a motor employing a stator having concentrated windings in accordance with a first exemplary embodiment of the present invention.
- FIG. 2A and FIG. 2B are perspective views of a stator tooth of the motor shown in FIG. 1 .
- FIG. 3A and FIG. 3B are perspective view of a stator tooth of a motor in accordance with a second exemplary embodiment of the present invention.
- FIG. 4 is a perspective view of a stator of the motor in accordance with the second embodiment.
- FIG. 5 is a plan view of a stator core-sheet of a motor in accordance with a third exemplary embodiment of the present invention.
- FIG. 6 shows a structure of a compressor in accordance with a fourth exemplary embodiment of the present invention.
- FIG. 7A is a front view of a conventional stator tooth.
- FIG. 7B is a sectional view of the stator tooth shown in FIG. 7A .
- FIG. 1 is a front view of a motor employing a stator having concentrated windings in accordance with the first exemplary embodiment of the present invention.
- FIG. 2A and FIG. 2B are perspective views of a stator tooth of the motor shown in FIG. 1 .
- stator 1 is formed by assembling 12 pieces of divided stator members 2 into an annular shape. Each one of divided stator members 2 has a tooth, and has been wound with windings 4 in a concentrated manner via insulator 5 .
- Rotor 6 has eight pieces of permanent magnets 7 within a core, and faces stator 1 via an annular space. Stator 1 and rotor 6 form a motor having interior magnets.
- This first embodiment refers to the motor with interior magnets; however, the present invention is applicable to a motor with surface magnets, or a switched reluctance motor.
- the motor with surface magnets permanent magnets are disposed on a surface of a rotor core, and the switched reluctance motor uses a stator having concentrated windings.
- a motor having 12 stator teeth (12 slots) and 8 rotor poles is used; however, the present invention is not limited to this motor.
- Stator tooth 10 is formed by laminating a plurality of core sheets made of electromagnetic steel plate. At least parts of end faces along the laminating direction of the core sheets are bonded with adhesive. To be more specific, adhesive is infiltrated into end faces, of the core sheets laminated, along inner rim 11 and outer rim 12 of stator tooth 10 . Instant adhesive of cyanoacrylate system is used, and this adhesive has a low viscosity of ca. not more than 100 mPa ⁇ S.
- the first embodiment when an annular stator is assembled with divided members of which teeth are wound with windings via insulator, the divided members are neither welded nor caulked as they are done in the conventional stator. Therefore, electrical insulation is not damaged at welded spots, and eddy current does not increase, which keeps the motor efficient. As a result, the first embodiment can provide a small, efficient and high performance motor using a concentrated winding stator in a simple structure.
- anaerobic adhesive or UV curing adhesive for instance, can be used instead of the instant adhesive of cyanoacrylate system.
- FIG. 3A and FIG. 3B are perspective view of a stator tooth of a motor in accordance with the second exemplary embodiment of the present invention.
- Stator tooth 20 is formed by laminating a plurality of core sheets made of electromagnetic steel plate. At least parts of end faces along the laminating direction of the core sheets are bonded with adhesive. To be more specific, adhesive is infiltrated into the end faces, of the core sheets laminated, along inner rim 21 of stator tooth 20 , so that the core sheets are fixed to each other.
- instant adhesive of cyanoacrylate system is used, and this adhesive has a low viscosity of ca. not more than 100 mPa ⁇ S.
- parts of a tooth except a section (inner rim of the stator) facing a rotor are welded for fixing the core sheets. This is different from the first embodiment.
- parts of outer rim 22 (back face of the tooth) are welded, i.e., outer rim 22 does not face the rotor.
- the inner rim of the stator encounters intense changes of magnet flux because the inner rim faces the rotor. Therefore, welding the inner rim would invite damages of insulation between the core sheets. In such a case, eddy current increases substantially, which lowers the motor efficiency.
- this second embodiment since the inner rim of the stator is not welded, high efficiency is still maintained.
- FIG. 4 is a perspective view of the stator of the motor in accordance with the second embodiment.
- FIG. 4 does not show windings or insulators but only shows welded spots on outer rim of stator 25 for making the description more understandable. As shown in FIG. 4 , several spots are welded partially on the outer rim, so that substantial fixing strength is produced. This structure is thus applicable to a large size motor.
- an annular stator is assembled with divided stator members of which teeth are wound with windings via insulators.
- an inner rim—facing the rotor—of each member is not welded or caulked, but is bonded partially with adhesive.
- the outer rim is welded partially for fixing the core sheets to each other. The welded spots do not invite damages of insulation, and eddy current thus does not increase, which keeps the motor efficient.
- the second embodiment can provide a small, efficient and high performance motor using a concentrated winding stator in a simple structure.
- FIG. 5 is a plan view of stator core-sheet of a motor in accordance with the third embodiment.
- core-sheet 30 includes bonding section 31 , welding section 32 , and area 33 between bonding section 31 and welding section 32 .
- bonding section 31 adhesive is infiltrated for bonding a plurality of the core sheets laminated, so that a divided stator member is constructed.
- stator teeth adjacent to each other are welded into an annular shape for linking the divided stator-members adjacent to each other.
- area 33 is a non-bonding section near welding section 32 .
- area 33 is coated with water and oil repellent material, so that area 33 blocks the adhesive from infiltrating around the welding sections. Therefore, this structure prevents the gas produced by the adhesive from interfering with the welding. As a result, strong welding is achievable, which strengthens the stator and increases accuracy of the annular stator.
- quick-drying coating agent of silicone system is effective.
- the coating agent can be applied to the core sheets after the punching and the annealing. If no annealing is taken, the coating agent can be applied to the core sheets during the punching.
- an annular stator is assembled with divided members, of which teeth are wound with windings via insulators.
- the welding sections are welded and the core sheets are fixed in order to link the divided stator members adjacent to each other.
- the inner rim, facing the rotor, of each member is not welded or caulked, but is bonded partially with adhesive.
- the welded spots on the outer rim do not invite damages of insulation, and eddy current thus does not increase, which keeps the motor efficient.
- the third embodiment can provide a small, efficient and high performance motor using a concentrated winding stator in a simple structure.
- FIG. 6 illustrates a structure of a compressor in accordance with the fourth exemplary embodiment.
- motor 131 includes stator 101 , rotor 102 , and permanent magnets 106 disposed in rotor 102 . Any structure of the motors demonstrated in the embodiments discussed previously is applicable to this compressor.
- Motor 131 and compressing section 132 are disposed in air-tight housing 133 .
- Accumulator 135 is provided to suction pipe 134 of compressing section 132
- projecting pipe 136 is provided to an upper section of housing 133 .
- the compressor is thus constructed.
- the present invention realizes a small, efficient and high performance compressor, which enjoys the advantages of motor 131 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Manufacture Of Motors, Generators (AREA)
- Compressor (AREA)
Abstract
Description
-
- (a) a stator formed by assembling a plurality of divided stator members having teeth into an annular shape; and
- (b) a rotor facing the stator.
Each one of the divided stator members is formed by laminating a plurality of core sheets and bonding at least parts of the end faces along the laminating direction of the core sheets with adhesive.
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/344,327 US7126248B2 (en) | 2001-03-02 | 2006-01-30 | Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-057757 | 2001-03-02 | ||
JP2001057757A JP4747423B2 (en) | 2001-03-02 | 2001-03-02 | Electric motor |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/344,327 Continuation US7126248B2 (en) | 2001-03-02 | 2006-01-30 | Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020145359A1 US20020145359A1 (en) | 2002-10-10 |
US7026741B2 true US7026741B2 (en) | 2006-04-11 |
Family
ID=18917584
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/090,476 Expired - Lifetime US7026741B2 (en) | 2001-03-02 | 2002-03-04 | Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor |
US11/344,327 Expired - Lifetime US7126248B2 (en) | 2001-03-02 | 2006-01-30 | Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/344,327 Expired - Lifetime US7126248B2 (en) | 2001-03-02 | 2006-01-30 | Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor |
Country Status (6)
Country | Link |
---|---|
US (2) | US7026741B2 (en) |
EP (1) | EP1364442B8 (en) |
JP (1) | JP4747423B2 (en) |
CN (1) | CN1291538C (en) |
DE (1) | DE60227053D1 (en) |
WO (1) | WO2002071575A2 (en) |
Cited By (3)
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US20080238242A1 (en) * | 2007-03-28 | 2008-10-02 | Mitsubishi Electric Corporation | Dynamoelectric machine |
US20130088317A1 (en) * | 2011-10-11 | 2013-04-11 | Sumitomo Wiring Systems, Ltd. | Reactor and method of manufacturing the same |
US20180086375A1 (en) * | 2015-04-13 | 2018-03-29 | Lg Innotek Co., Ltd. | Torque sensor module, steering angle sensing device, and stator manufacturing method |
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US6784588B2 (en) * | 2003-02-03 | 2004-08-31 | Metglas, Inc. | Low core loss amorphous metal magnetic components for electric motors |
JP2005278298A (en) * | 2004-03-24 | 2005-10-06 | Yaskawa Electric Corp | Split core, skewed split laminated core, skewed laminated annular core, split laminated core skew forming apparatus, stator and electric motor |
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- 2001-03-02 JP JP2001057757A patent/JP4747423B2/en not_active Expired - Lifetime
-
2002
- 2002-02-28 DE DE60227053T patent/DE60227053D1/en not_active Expired - Lifetime
- 2002-02-28 WO PCT/JP2002/001834 patent/WO2002071575A2/en active IP Right Grant
- 2002-02-28 EP EP02701622A patent/EP1364442B8/en not_active Expired - Lifetime
- 2002-02-28 CN CNB028058720A patent/CN1291538C/en not_active Expired - Fee Related
- 2002-03-04 US US10/090,476 patent/US7026741B2/en not_active Expired - Lifetime
-
2006
- 2006-01-30 US US11/344,327 patent/US7126248B2/en not_active Expired - Lifetime
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US5477096A (en) * | 1992-12-16 | 1995-12-19 | Kabushiki Kaisha Sankyo Seiko Seisakusho | Laminated core for a motor |
US5306976A (en) * | 1993-01-29 | 1994-04-26 | General Electric Company | Motor and stationary assembly therefor having end caps and overlapping film slot insulation |
US5583387A (en) * | 1993-06-14 | 1996-12-10 | Matsushita Electric Industrial Co., Ltd. | Stator of dynamo-electric machine |
JPH07170699A (en) | 1993-12-10 | 1995-07-04 | Nippon Densan Corp | Manufacturing stator core |
JPH08149725A (en) | 1994-11-15 | 1996-06-07 | Matsushita Electric Ind Co Ltd | Stator for electric rotating machine |
US5786651A (en) * | 1996-02-22 | 1998-07-28 | Honda Giken Kogyo Kabushiki Kaisha | Stator core having a plurality of connected circumferentially segmented cores and method and apparatus for assembling same |
US6049153A (en) * | 1996-02-23 | 2000-04-11 | Matsushita Electric Industrial Co., Ltd. | Motor |
US6104117A (en) * | 1996-05-24 | 2000-08-15 | Matsushita Electric Industrial Co., Ltd. | Motor with reduced clogging torque incorporating stator salient poles and rotor magnetic poles |
JPH11308821A (en) | 1998-04-22 | 1999-11-05 | Mitsui High Tec Inc | Manufacture of layered core |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080238242A1 (en) * | 2007-03-28 | 2008-10-02 | Mitsubishi Electric Corporation | Dynamoelectric machine |
US20130088317A1 (en) * | 2011-10-11 | 2013-04-11 | Sumitomo Wiring Systems, Ltd. | Reactor and method of manufacturing the same |
CN103050226A (en) * | 2011-10-11 | 2013-04-17 | 住友电装株式会社 | Reactor and method of manufacturing the same |
CN103050226B (en) * | 2011-10-11 | 2016-09-21 | 住友电装株式会社 | Reactor and manufacture method thereof |
US20180086375A1 (en) * | 2015-04-13 | 2018-03-29 | Lg Innotek Co., Ltd. | Torque sensor module, steering angle sensing device, and stator manufacturing method |
US10315694B2 (en) * | 2015-04-13 | 2019-06-11 | Lg Innotek Co., Ltd. | Torque sensor module, steering angle sensing device, and stator manufacturing method |
Also Published As
Publication number | Publication date |
---|---|
EP1364442A2 (en) | 2003-11-26 |
WO2002071575A3 (en) | 2002-12-12 |
WO2002071575A2 (en) | 2002-09-12 |
EP1364442B8 (en) | 2008-10-29 |
JP4747423B2 (en) | 2011-08-17 |
JP2002262485A (en) | 2002-09-13 |
US20060125340A1 (en) | 2006-06-15 |
EP1364442B1 (en) | 2008-06-11 |
CN1291538C (en) | 2006-12-20 |
US20020145359A1 (en) | 2002-10-10 |
US7126248B2 (en) | 2006-10-24 |
DE60227053D1 (en) | 2008-07-24 |
CN1639948A (en) | 2005-07-13 |
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